Vibrating motor

ABSTRACT

A vibrating motor is provided in the present disclosure. The vibrating motor includes a shell providing an accommodating space, a vibrating system accommodated in the accommodating space, and a flexible circuit board. The vibrating system includes a coil assembly, and the flexible circuit board includes a fixing part fixed to the shell, a connecting part connected to the coil assembly, and a flexible connecting arm connected between the fixing part and the connecting part.

FIELD OF THE DISCLOSURE

The present disclosure generally relates to vibrator technologies, andmore particularly, to a vibrating motor for providing vibrationfeedback.

BACKGROUND

With development of mobile communication technologies, mobile devices,such as mobile phones, handheld game players, tablet computers, portablemultimedia players, or the like, become more and more popular. Mobiledevices generally include vibrating motors for generating vibrationfeedback. For example, a vibrating motor may be used in a mobile phonefor performing vibration and providing system feedback while receivingan incoming call or a message such as a short message, a multimediamessage, an instant message, or a push message.

A typical vibrating motor includes a vibrator and a coil for driving thevibrator to vibrate, the coil includes a lead wire for receiving anelectric signal. However, when the vibrator operates in a resonancestate with great vibration amplitude, the lead wire of the coil may beover-stretched and suffer fracture, which may further cause thevibrating motor to become failure. Therefore, a reliability of thevibrating motor is low.

Therefore, it is desired to provide a vibrating motor to overcome theaforesaid problems.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referenceto the following drawings. The components in the drawing are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic assembled view of a vibrating motor according toan exemplary embodiment of the present disclosure;

FIG. 2 is an exploded view of the vibrating motor in FIG. 1;

FIG. 3 is a schematic view of a flexible circuit board of the vibratingmotor of FIG. 1.

DETAILED DESCRIPTION

The present disclosure will be described in detail below with referenceto the attached drawings and embodiments thereof.

Referring to FIGS. 1-2, a vibrating motor 1 according to an exemplaryembodiment of the present disclosure is shown. The vibrating motor 1includes a shell 11 for providing an accommodating space, a vibratingsystem 12 accommodated in the accommodating space, a pair of elasticconnectors 13 for elastically suspending the vibrating system 12 in theshell 11, and a flexible circuit board 15 for transmitting electricsignals to drive the vibrating system 12 to perform linear vibrate alonga vibration direction. The vibration direction of the vibrating system12 may be parallel to an X-axis direction as illustrated in FIG. 2.

The shell 11 includes a base 111 and a cover 110 covering the base forforming the accommodating space. The base 111 includes a supportingplatform 1111 extending from an end of the base 111, the supportingplatform 111 is coplanar with a main surface of the base 111, and is notcovered by the cover 110. The supporting platform 1111 may include oneor more solder pad for electrically connecting to an external circuit.

The vibrating system 12 includes a first vibrating unit and a secondvibrating unit. The first vibrating unit includes a first mass member122, a first pole plate 123 and a coil assembly 121. The first massmember 122 is in a substantially rectangular plate shape, and includes agroove 1221 recessed from a bottom surface thereof for receiving thecoil assembly 121. The first mass member 122 may also include a pair ofprotrusions 1222 protruding outwards from two opposite sidewalls thereofalong a Y-axis direction perpendicular to the vibration direction (i.e.,the X-axis direction). The pair of protrusions 1222 is diagonallylocated at two opposite sides of the groove 1221, and is adjacent to thegroove 1221. The first pole plate 123 is attached to the coil assembly121, and is also received in the groove 1221.

The coil assembly 121 may include a first coil 1211, a second coil 1213and a circuit substrate 1212. The circuit substrate 1212 may be aflexible printed circuit board for supporting the first coil 1211 andthe second coil 1213. The first coil 1211 and the second coil 1213 areelectrically connected in serial via the circuit substrate 1212. Inparticular, the first coil 1211 includes a first lead wire 1214, and thesecond coil 1213 includes a second lead wire 1215; both of the firstlead wire 1214 and the second lead wire 1215 may be led out from abottom of the coil assembly 121 along two opposite directions.

The second vibrating unit includes a second mass member 124, a secondpole plate 125 and a magnet 126. The second mass member 124 is also in asubstantially rectangular plate shape, and includes a through hole 1241formed at a central region thereof. The through hole 1241 is opposite tothe groove 1221 of the first mass member 122, and the magnet 126 isreceived in the through hole 1241. The second pole plate is attached toa bottom surface of the second mass block 125.

Referring also to FIG. 3, the flexible circuit board 15 of the vibratingmotor 1 includes a fixing part 151 fixed to the shell 11, a connectingpart 153 electrically connected to the vibrating system 12, and aflexible connecting arm 155 connected between the fixing part 151 andthe connecting part 153.

The fixing part 151 may have a shape and a size in accordance with thesupporting platform 1111 of the base 111, for example, the fixing part151 may be in a rectangular shape, and the fixing part 151 iselectrically fixed onto the supporting platform 111.

The connecting part 153 includes a first connecting end 1531electrically connected to the first lead wire 1214 of the first coil1211, and a second connecting end 1532 electrically connected to thesecond lead wire 1215 of the second coil 1213.

The flexible connecting arm 155 includes a first connecting strip 1551connected to the first connecting end 1531, a second connecting strip1552 connected to the second connecting end 1532, a third connectingstrip 1553 connected between the first connecting strip 1551 and thesecond connected strip 1552, and a fourth connecting strip 1554connected between the third connecting strip 1553 and the fixing part151.

The first connecting strip 1551 includes a first strip portion 1551 aand a first curved portion 1551 b. The first strip portion 1551 a isconnected between a first end of the third connecting strip 1553 and thefirst curved portion 1551 b. The first curved portion 1551 b extendstowards the fixing part 151 from an end of the first strip portion 1551a in a U-shaped manner, and the first connecting end 1531 is connectedto an end of the first curved portion 1551 b.

The second connecting strip 1552 includes a second strip portion 1552 a,a third strip portion 1552 b and a second curved portion 1552 c. Thesecond strip portion 1552 a is an orthogonal zigzagged strip portionconnected between a second end of the third connecting strip 1553 andthe third strip portion 1552 b. The third strip portion 1552 b isperpendicularly connected to an end of the second strip portion 1552 a.The second curved portion 1552 c extends opposite to the fixing part 151from an end of the third strip portion 1552 b in a U-shaped manner, andthe second connecting end 1532 is connected to an end of the secondcurved portion 1552 c.

The second strip portion 1552 a of the second connecting strip 1552 issubstantially parallel to the first strip portion 1551 a of the firstconnecting strip 1551, and the third strip portion 1552 b issubstantially parallel to the third connecting strip. Both the firststrip portion 1551 a and the second strip portion 1552 a issubstantially perpendicular to the third connecting strip 1553

Moreover, the first strip portion 1551 a of the first connecting strip1551, the second strip portion 1552 a and the third strip portion 1552 bof the second connecting strip 1552, and the third connecting strip 1553is coplanar with each other. The first connecting end 1531 and thesecond connecting end 1532 are coplanar with each other, but arenon-coplanar with the first strip portion 1551 a, the second stripportion 1552 a, the third strip portion 1552 b and the third connectingstrip 1553. The fourth connecting strip 1554 extends vertically from acentral edge of the third strip portion 1552 b, and is connected to thefixing part 151. With the above-described configuration, the firstconnecting strip 1551, the second connecting strip 1552, the thirdconnecting strip 1553 and the fourth connecting strip 1554 cooperativelyform a frame structure matching a profile of the first mass member 122.

The flexible circuit board 155 may be placed on an upper surface of thefirst mass member 122, the first curved portion 1551 b and the secondcurved portion 1552 c enables the first connecting end 1531 and thesecond connecting end 1532 to bypass the pair of protrusions 1222 of thefirst mass member 122. Accordingly, the first connecting end 1531 can befixed to a bottom of one of the protrusions 1222, and is connected tothe second lead wire 1215 of the second coil 1213 by welding; similarly,the second connecting end 1532 can be fixed to a bottom of the other oneof the protrusions 1222, and is connected to the first lead wire 1214 ofthe first coil 1211 by welding. Furthermore, the fixing part 151 of theflexible circuit board 15 can extend to the supporting platform 1111 ofthe base 111 via the fourth connecting strip 1554, and is furtherconnected to the external circuit for receiving the electric signals viathe solder pad on the supporting platform 1111.

In operation, the coil assembly 121 receives the electric signals viathe flexible circuit board 155, and drives the vibrating system 12 toperform linear vibration. During the vibration of the vibrating system12, the connecting part 153 and the flexible connecting arm 155 of theflexible circuit board 155 are driven to vibrate accompanying with thecoil assembly 121 and the lead wires 1214 and 1215 thereof, andconsequently, the lead wires 1214 and 1215 can be protected from beingover-stretched. As such, a reliability of the vibrating motor 1 can beimproved.

It is to be understood, however, that even though numerouscharacteristics and advantages of the present embodiments have been setforth in the foregoing description, together with details of thestructures and functions of the embodiments, the disclosure isillustrative only, and changes may be made in detail, especially inmatters of shape, size, and arrangement of parts within the principlesof the invention to the full extent indicated by the broad generalmeaning of the terms in which the appended claims are expressed.

What is claimed is:
 1. A vibrating motor, comprising: a shell providingan accommodating space; a vibrating system accommodated in theaccommodating space and comprising a coil assembly, the coil assemblycomprising a first coil with a first lead wire and a second coil with asecond lead wire, the first coil and the second coil are electricallyconnected in series; and a flexible circuit board comprising a fixingpart fixed to the shell, a connecting part connected to the coilassembly, and a flexible connecting arm connected between the fixingpart and the connecting part, wherein the connecting part of theflexible circuit board comprises a first connecting end connected to thefirst lead wire of the first coil, and a second connecting end connectedto the second lead wire of the second coil; the flexible connecting armcomprises a first connecting strip connected to the first connectingend, a second connecting strip connected to the second connecting end, athird connecting strip connected between the first connecting strip andthe second connected strip; the first connecting strip comprises a firststrip portion connected to a first end of the third connecting strip,and a first curved portion connected to the first connecting end; thefirst curved portion extends towards the fixing part from an end of thefirst strip portion in a U-shaped manner.
 2. The vibrating motor asdescribed in claim 1, wherein the second connecting strip comprises asecond strip portion connected to a second end of the third connectingstrip, a second curved portion connected to the second connecting end,and a third strip portion connected between the second strip portion andthe second curved portion.
 3. The vibrating motor as described in claim2, wherein the second strip portion is an orthogonal zigzagged stripportion connected between the second end of the third connecting stripand the third strip portion, the third strip portion is perpendicularlyconnected to an end of the second strip portion, and the second curvedportion extends opposite to the fixing part from an end of the thirdstrip portion in a U-shaped manner.
 4. The vibrating motor as describedin claim 3, wherein the second strip portion of the second connectingstrip is substantially parallel to the first strip portion of the firstconnecting strip, and both the first strip portion and the second stripportion is substantially perpendicular to the third connecting strip. 5.The vibrating motor as described in claim 3, wherein the first stripportion, the second strip portion, the third strip portion, and thethird connecting strip is coplanar with each other; the first connectingend and the second connecting end are coplanar with each other, but arenon-coplanar with the first strip portion, the second strip portion, thethird strip portion and the third connecting strip.
 6. The vibratingmotor as described in claim 5, wherein the flexible connecting armfurther comprises a fourth connecting strip extending vertically from acentral edge of the third strip portion, and is connected to the fixingpart.
 7. The vibrating motor as described in claim 6, wherein the shellcomprises a base and a cover covering the base for forming theaccommodating space; the base comprises a supporting platform extendingfrom and coplanar with the base, the fixing part of the flexible circuitboard is electrically fixed to the supporting platform.
 8. The vibratingmotor as described in claim 6, wherein the first connecting strip, thesecond connecting strip, the third connecting strip and the fourthconnecting strip cooperatively form a frame structure matching a profileof the first mass member.
 9. The vibrating motor as described in claim8, wherein the vibrating system further comprises a first mass memberand a first pole plate, the first mass member comprises a grooverecessed from a bottom surface thereof for receiving the coil assembly,the first pole plate is attached to the coil assembly, and is alsoreceived in the groove.
 10. The vibrating motor as described in claim 9,wherein the first mass member further comprises a pair of protrusionsprotruding outwards from two opposite sidewalls thereof along adirection perpendicular to a vibration direction of the vibratingsystem, the pair of protrusions is diagonally located at two oppositesides of the groove.
 11. The vibrating motor as described in claim 10,wherein the flexible circuit board is placed on the first mass member,the first connecting end and the second connecting end bypass the pairof protrusions to be connected with the coil assembly respectively viathe first curved portion and the second curved portion.
 12. Thevibrating motor as described in claim 9, wherein the vibrating systemfurther comprises a second mass member, a second pole plate and amagnet, the second mass block comprises a through hole opposite to thegroove of the first mass member; the magnet is received in the throughhole, and the second pole plate is attached to a bottom surface of thesecond mass block.